Automatic air-valve for hot-water radiators



(Nd Model.)

E. SQHOYT. AUTOMATIC A-IR VALVE FOR HOT WATER RADIATORS. N6. 508,017.

ammo; v 55713.

NITED STATES PATENT OFFICE.

EZRA S. 'I-IOYT, OF DETROIT, MICHIGAN.

AUTOMATIC AIR-VALVE FOR HOT-WATER RADIATORS.

SPECIFICATION forming part of Letters Patent No. 508,017, dated November7, 1893.

Application filed July 9, 1892. Serial No. 439.507- (No model.)

of the United States, residing at Detroit, in the,

county of Wayne, State of Michigan, have invented certain new and usefulImprovements in Automatic Air-Valves for Hot-Water Ra diators, of whichthe following is a specificatwo, reference being had therein to theaccompanying drawings.

This invention relates to certain new and useful improvements in airvalves for hot water radiators, and it has for its objects among othersto provide a simple and cheap valve, readily accessible for repairs orother purposes, not liable to get out of order or leak, and in which thevalve will be seated by the buoyancy-0f the float carrying it. I providethe valve casing with .a removable top provided with a valve-seat, andwithin this casing is arranged a float of any suitable material carryingatits upper end or side a valve fitted to the said seat and it may carryat its lower end a guide; this guide may however sometimes be omitted ifdesired. A suitable cook or valve is provided which allows of theshutting ofi of the water to renew, repair or clean the valve withoutdraining the water lines in the building.

Other objects and advantages of the invention will hereinafter appearand the novel features thereof will be specifically definedby theappended claims.

The invention is clearly illustrated in the accompanying drawings,which, with the let-.

ters of reference marked thereon, form a part of this specification, andin which- Figure 1 is a centralvertical section through my improvement.Fig. 2- is a plan thereof with the cap removed and a portion ofthe floatbroken away.

I Like letters of reference indicate like parts in both of the views.

Referring now to the details of the drawings by letter, A designates theshell, body, or case' of the device which may be of brass, or anysuitable material provided with a central vertical passage a from itsbottom communicating with a horizontal passage a through the nipple Bwhich is exteriorly threaded for connection with the radiator and whichis provided with a suitable cock C by means of which the water can beshut off when necessary for the purpose of renewing, repairing orcleaning the valve. The body or case is threaded at its upper end toreceive a removable threaded cap D which is provided with a valve seat dand an air passage d" as shown in Fig. 1.

E is a float arranged to move loosely within the body or case and whileI preferably make this of cork it may be formed of aluminum, or otherlight substance or material. It carries at its upper side a valve efitted to the valve seat in the top and at its lower end a guidef whichmay be acontinuation of the valve stem if desired as seen in Fig. 1. Theinner face of the cap and the inner face of the bottom of the case areslightly conical as seen in Fig. 1 so as to prevent such flat and directcontact of the float therewith as to create a suction to prevent itsoperation. It will be observed that the upper face of the bottom wall ofthe shell or body A is slightly conical and that the under face of thecap D is tapered slightly from the center toward the periphery asclearly shown in Fig. 1 whereby the float E touches only at the highestor central portion of the said bottom and inner face of the cap so as toleave at all times a space between the upper or lower faces of the floatand the cap or bottom of the shell, and the limit of movement of thefloat can be regulated by screwing the cap up or down as oocasion mayrequire and still prevent the float from coming in contact. with theunder face of the cap except at the central portion thereof.

.The operation will be readily understood from the foregoing descriptionwhen taken in passage in the bottom of the case and at its upper endcarrying a valve for closing the passage in the top, substantially asshown and described.

2. The herein described radiator attachment, consisting of the casehaving a central vertical passage through its bottom and a threadednipple having horizontal passage communicating with a vertical passage,a cock controlling the passage in the nipple, a top having an airpassage therethrough and a valve seat, a buoyant body within the caseand loosely guided at its lower end in the vertical passage in thebottom of the case and at its upper end carrying a valve for closing thepassage in the top, the said stein having a shoulder below the valveagainst which the buoyant body engages, substantially as described.

3. The combination with the case having a right angled screw-threadednipple with a continuous passage through the same and through the bottomof the case, of a cock-controlling passage through the nipple, an ad;justable cap to said case having conical valve seat with air passageleading outward therefrom, a cork float within the case and 'a guide rodpassed vertically through the float and held therein by friction withits lower end extending into the passage in the bottom of the case andits upper end conical to fit the valve seat and having a shoulderagainst which the upper face of the float engages, substantially asspecified.

4. The combination with the case having integral bottom and walls andthreaded nipple with passageway, the bottom of the chamber thereof beinginclined from the central aperture toward the periphery, of a removableand adjustable cap having vent and central tapered passage-waycommunicating therewith, the inner wall of the cap being inclined fromthe passageway toward the periphery inversely of the taper of the bottomof the chamber, a float within the chamber and a valve held in the floatwith its lower end projecting to be guided in the passageway in thebottom of said chamber, substantially as shown and described.

In testimony whereof Iaflix my signature in presence of two witnesses.

EZRA S. HOYT.

Witnesses:

ELBRIDGE F. BACON, J. B. IIoUcK.

